#include <stdio.h>

int main() {
    double n = 0;
    int l = 0;
    int t = 0;
    double a = 0;
    scanf_s("%d %d", &l, &t);
    a = t / 100.00;
    n = l / (a * a);
    printf("%.2f", n);
    return 0;
}